Heat dissipation type modularized lithium battery pack

Abstract

The invention relates to the technical field of modularized lithium battery packs, in particular to a heat dissipation type modularized lithium battery pack which comprises a battery bin, a plurality of battery packs are fixedly installed at the inner end of the battery bin, a plurality of heat dissipation fins are fixedly installed on the outer surface of a heat dissipation pipe, and the heat dissipation fins are tightly attached to the outer surfaces of battery cells on the periphery of the heat dissipation pipe. A high-temperature power-off device is arranged in the heat dissipation pipe, a water inlet pipe is fixedly installed at the bottom end of the inner side of the battery bin, the output end of the water inlet pipe is fixedly connected with the output end of the heat dissipation device, a plurality of flow dividing pipes are fixedly connected to the outer surface of the water inlet pipe, and the flow dividing pipes are fixedly connected with the bottom end of the heat dissipation pipe. The stabilizing ring is arranged in the through cavity, so that the upper and lower cavities of the stabilizing ring are communicated through the through cavity, the flowing volume of the cooling liquid is increased, more heat can be taken away, the flowing caliber of the cooling liquid is enlarged, the flow of the cooling liquid is increased, heat generated by the battery pack can be taken away more quickly, and the temperature of a local high-temperature area is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of modular lithium battery packs, in particular to a heat dissipation type modular lithium battery pack. Background Art

[0002] With the rapid development of new energy technologies, especially the widespread application of electric vehicles, energy storage systems and portable electronic devices, lithium batteries, as a type of battery with high energy density, long life and light weight, have become an important way of energy storage and supply. However, during the use of lithium batteries, especially in high-power application environments, there are certain thermal management problems. As the battery discharges and charges, the temperature inside the battery pack will gradually increase. Excessive temperature will not only reduce the service life of the battery, but may also cause thermal runaway of the battery, leading to safety accidents. Therefore, how to effectively dissipate the heat of lithium battery packs has become a key technology to improve the safety and performance of battery packs.

[0003] After searching, it was found that the prior art publication number is CN106299535A, which discloses a battery pack cooling system, including an outer frame, a plurality of battery modules are arranged inside the outer frame, and the battery modules can be pushed and pulled inside the outer frame. Two groups of fixed piles A and B are arranged on the end of the battery module in contact with the back of the outer frame. The fixed piles are hollow structures and communicate with the inside of the battery module. An air inlet pipe and an air outlet pipe are arranged on the back of the outer frame. A slot for accommodating the fixed piles of group A is arranged on the air inlet pipe, and a slot for accommodating the fixed piles of group B is arranged on the air outlet pipe. The air inlet pipe has one and only one end opening, and an air inlet column connected to the open end of the air inlet pipe is arranged. The air outlet pipe has one and only one end opening, and an air outlet column connected to the open end of the air outlet pipe is arranged. A locking device is arranged between the battery module and the outer frame. The battery pack cooling system of this scheme can effectively reduce the volume of the battery pack system and ensure excellent heat dissipation performance.

[0004] Therefore, based on the above search and in combination with the existing technology, when the above solution is used, the heat released by the battery during long-term use, if the temperature reaches a certain critical point, when the heat dissipation does not work on it, if the power is not cut off in time, the chemical reaction inside the battery will be accelerated, further generating heat, and eventually leading to thermal runaway, forming an uncontrollable chain reaction, which may cause fire or even explosion, posing a huge threat to the equipment and the surrounding environment. For this reason, we propose a heat dissipation modular lithium battery pack. Summary of the invention

[0005] The object of the present invention is to provide a heat dissipation modular lithium battery pack to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a heat-dissipating modular lithium battery pack, comprising a battery compartment, a plurality of battery packs are fixedly installed at the inner end of the battery compartment, the battery packs are arranged in a rectangular array, a heat dissipation device is fixedly installed at the right end of the battery compartment, heat dissipation pipes for continuously cooling the battery cells are fixedly installed in the battery packs, a return pipe is provided at the inner end of the battery compartment, the output end of the return pipe is fixedly connected to the input end of the heat dissipation device, a branch pipe is fixedly connected to the upper end of the heat dissipation pipe, and the branch pipes are fixedly connected to the return pipe, a coolant for transferring heat flows inside the heat dissipation pipe and the return pipe, a plurality of heat dissipation fins are fixedly installed on the outer surface of the heat dissipation pipe, and the heat dissipation fins are tightly fitted to the outer surface of the battery cells around the heat dissipation pipe, a high-temperature power-off device is provided inside the heat dissipation pipe, a water inlet pipe is fixedly installed at the inner bottom end of the battery compartment, the output end of the water inlet pipe is fixedly connected to the output end of the heat dissipation device, a plurality of shunt pipes are fixedly connected to the outer surface of the water inlet pipe, and the shunt pipe is fixedly connected to the bottom end of the heat dissipation pipe.

[0007] As a further solution of the present invention, a plurality of stabilizing holes are provided at the inner end of the heat dissipation fin, and a heat tube is fixedly installed in each of the stabilizing holes. The heat tube is arranged in a ring shape, and a guide rod is fixedly installed at the inner end of the heat tube. A piston block is slidably installed on the outer surface of the guide rod. A liquid that can expand when heated is filled between the upper part of the piston block and the heat tube. The liquid that can expand when heated can quickly sense heat and conduct it to the piston block, thereby enhancing the heat dissipation effect through the movement of the piston.

[0008] As a further solution of the present invention, the high-temperature power-off device includes a stabilizing tube, which is fixedly installed on the inner end of the heat dissipation tube, and a conducting tube is fixedly installed on the inner upper end of the heat dissipation tube, and the conducting tube is connected to the branch tube. Mounting rings are fixedly installed on the upper and lower ends of the outer surface of the stabilizing tube, and a plurality of bimetallic strips that can deform when heated are arranged on the periphery of the mounting ring. The bimetallic strips are deformed when heated and can trigger the power-off device, which automatically cuts off the power supply when the battery temperature is too high, thereby avoiding safety accidents caused by overheating.

[0009] As a further solution of the present invention, a rotating shaft is rotatably mounted on the bottom end of the bimetallic strip, and the rotating shaft is rotatably connected to a mounting ring below the stabilizing tube, and a stabilizing ring is fixedly mounted on the upper end of the stabilizing tube.

[0010] As a further solution of the present invention, the outer surface of the stabilizing ring is provided with a plurality of holes of different sizes, wherein a conducting plug is slidably installed in the large holes, and the small holes are used for the normal flow of coolant, and a traction rod is rotatably installed at the bottom end of the conducting plug, and the end of the traction rod away from the conducting plug is rotatably connected to the upper end of the bimetallic strip.

[0011] As a further solution of the present invention, a stabilizing tube is fixedly installed on the inner bottom end of the stabilizing tube, a connecting rod is passed through the inner end of the stabilizing tube, a contact block is fixedly connected to the bottom end of the connecting rod, and a contact piece for clamping the contact block is fixedly installed on the upper end of the stabilizing tube. The contact piece clamps the contact block, which can effectively fix the position of the connecting rod, ensuring that internal components will not loosen or shift during operation, thereby improving the reliability of the overall system.

[0012] As a further solution of the present invention, a telescopic tube is fixedly installed on the inner end of the stabilizing tube, a push rod is fixedly connected to the upper end of the telescopic tube, the push rod and the stabilizing tube are connected by a reset spring, and the push rod corresponds to the connecting rod, and an injection pipe is fixedly installed on the inner end of the stabilizing tube, and the injection pipe corresponds to the push rod.

[0013] As a further solution of the present invention, a locking groove is provided on the outer surface of the contact block, and a plurality of locking rods are rotatably installed on the inner end of the stabilization cylinder. The locking rods are arranged in a ring shape, and the upper ends of the locking rods are clamped in the locking grooves, and the locking rods are connected to the top rod by a traction line.

[0014] As a further solution of the present invention, the conducting tube is connected to the stabilizing tube via a rubber sleeve, a reflux groove is provided at one end of the conducting tube close to the stabilizing tube, and an upper end of the rubber sleeve is located inside the reflux groove.

[0015] As a further solution of the present invention, a sealing ring is fixedly installed on the outer surface of the connecting rod, the sealing ring is located inside the rubber sleeve, and the sealing ring corresponds to the reflux groove. After the connecting rod moves upward, it drives the sealing ring to penetrate into the reflux groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the present invention is used, the conducting plug is pulled downward by the traction rod, so that the conducting cavity connects the upper and lower chambers of the stabilizing ring, thereby increasing the volume of the coolant flow, so that it can take away more heat, expand the coolant flow caliber, increase the coolant flow rate, help to take away the heat generated by the battery pack faster, and reduce the temperature of the local high-temperature area;

[0018] 2. When the present invention is used, if the heat of the battery cell continues to rise, the double-helix metal sheet begins to deform due to the heat, and then pushes the piston block to move downward, and squeezes the coolant inside the heated cylinder into the stabilizing cylinder, so that the upper end of the push rod pushes the contact block upward. At this time, the contact block is disconnected from the contact sheet, thereby preventing the battery pack from continuing to heat up and reducing the risk of thermal runaway due to overheating;

[0019] 3. The present invention does not require an additional power supply. The bimetallic spiral blade utilizes the thermal expansion characteristics of the material to automatically trigger deformation and cut off the power when the temperature is too high. It does not rely on any external energy source and is suitable as a passive protection device to avoid continuous overheating that may cause battery capacity attenuation or permanent damage. The power-off protection can prevent battery overheating damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of a heat dissipation modular lithium battery pack;

[0021] Figure 2 It is a structural schematic diagram of the battery pack;

[0022] Figure 3 It is a schematic diagram of the internal structure of the battery pack;

[0023] Figure 4 It is a schematic diagram of the structure of the heat pipe and the heat fins;

[0024] Figure 5 It is a schematic diagram of the structure of the heat receiving tube part of the heat dissipation fin;

[0025] Figure 6 It is a schematic diagram of the structure inside the heating cylinder;

[0026] Figure 7 It is a schematic diagram of the structure inside the piston block;

[0027] Figure 8 It is a schematic diagram of the structure inside the heat dissipation pipe;

[0028] Fig. 9 It is a schematic diagram of the positional relationship between the bimetallic strip and the stabilizing ring;

[0029] Fig.10 It is a schematic diagram of the structure inside the stabilizing tube;

[0030] Fig.11 It is a schematic diagram of the structure inside the stabilizing cylinder;

[0031] Fig.12 This is a schematic diagram of the structure inside the rubber sleeve.

[0032] In the figure: 1. battery compartment; 2. heat dissipation device; 3. battery pack; 4. water return pipe; 5. branch pipe; 6. water inlet pipe; 7. heat dissipation fins; 61. shunt pipe;

[0033] 101, heat dissipation pipe; 102, drag block; 103, connecting rod; 104, contact block; 105, contact sheet; 106, stabilizing tube; 107, injection tube; 108, traction line; 109, ejector rod; 110, locking groove; 111, locking rod; 112, return spring; 113, telescopic tube; 114, stabilizing tube;

[0034] 201, heating cylinder; 202, heat conducting pipe; 203, double spiral metal sheet; 204, piston block; 205, guide rod; 206, abutment spring; 207, receiving ball; 208, slot;

[0035] 301, stabilizing ring; 302, conducting plug; 303, traction rod; 304, bimetallic strip; 305, conducting cavity; 306, rotating shaft; 307, mounting ring;

[0036] 501, conducting tube; 502, rubber sleeve; 503, negative pressure cylinder; 504, plug rod; 505, sealing ring; 506, reflux groove. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1: Please refer to Figure 1 to Figure 4 A heat dissipation modular lithium battery pack includes a battery compartment 1. A plurality of battery packs 3 are fixedly installed at the inner end of the battery compartment 1 by bolts. The battery packs 3 are arranged in a rectangular array. A heat dissipation device 2 is fixedly installed at the right end of the battery compartment 1. Specifically, the heat dissipation device 2 is composed of a radiator, a water pump, a cooling pipe (the cooling pipe is made of copper), and a fan. The specific working principle is an existing mature technology and will not be described in detail here. A heat dissipation pipe 101 (the heat dissipation pipe 101 is made of aluminum alloy) for continuously cooling the battery cell is fixedly installed in the battery pack 3. A return water pipe 4 is provided at the inner end of the battery compartment 1. The output end of the return water pipe 4 is fixedly connected to the input end of the heat dissipation device 2. The heat dissipation pipe 101 is made of aluminum alloy. The upper end of the heat dissipation tube 101 is fixedly connected with a branch pipe 5, and the branch pipes 5 are fixedly connected with the return pipe 4, wherein the inside of the heat dissipation tube 101 and the return pipe 4 is filled with a coolant for transferring heat, and the coolant is pure water, and the specific heat capacity of pure water is higher than that of other liquids, so that the efficiency of heat dissipation of the battery core is higher, and the outer surface of the heat dissipation tube 101 is fixedly installed with a plurality of heat dissipation fins 7 (the heat dissipation fins 7 are made of aluminum alloy), and the heat dissipation fins 7 are closely fitted with the outer surface of the battery core around the heat dissipation tube 101. In order to achieve a higher efficiency of heat transfer, the heat dissipation fins 7 and the battery core are coated with heat dissipation silicone grease at the joints of the heat dissipation fins 7 and the battery core, and the heat dissipation silicone grease can fill the small gap between the heat dissipation fins 7 and the battery core;

[0039] When the temperature of the battery cell is too high, in order to prevent the high temperature from causing uncontrollable damage to the battery cell, a high-temperature power-off device is provided inside the heat dissipation tube 101, and a water inlet pipe 6 is fixedly installed at the inner bottom end of the battery compartment 1, and the output end of the water inlet pipe 6 is fixedly connected to the output end of the heat dissipation device 2, and a plurality of shunt pipes 61 are fixedly connected to the outer surface of the water inlet pipe 6, and the shunt pipe 61 is fixedly connected to the bottom end of the heat dissipation tube 101;

[0040] like Figure 4 - Figure 7 As shown, a plurality of stabilizing holes are provided at the inner end of the heat dissipation fin 7, and a heating cylinder 201 is fixedly installed in each of the stabilizing holes. The heating cylinder 201 is arranged in a ring shape, and a guide rod 205 is fixedly installed at the inner end of the heating cylinder 201. A piston block 204 is slidably installed on the outer surface of the guide rod 205. A high-temperature resistant sealing rubber ring is fixedly sleeved on the outer surface of the piston block 204, and the piston block 204 is tightly fitted with the inner wall of the heating cylinder 201 to increase air tightness. A liquid that can expand when heated is filled between the upper part of the piston block 204 and the heating cylinder 201. The liquid is silicone oil, which is a synthetic non-flammable liquid with high thermal stability and is non-flammable. The piston block 204 is connected to the heating cylinder 201 through a double-helix metal sheet 203, which is a combination of two metals of different materials. The thermal expansion coefficients of the two metals are different, so that the piston block 204 can be pushed downward when subjected to high temperature.

[0041] A slot 208 is provided on the outer surface of the guide rod 205, and a snap-in ball 207 is slidably installed on the left and right ends of the inner side of the piston block 204. The snap-in ball 207 is set on the inner wall of the slot 208, and the snap-in ball 207 and the piston block 204 are connected by abutment springs 206. When the double-helix metal sheet 203 expands due to heat, it pushes the piston block 204 to move downward. Since the snap-in ball 207 is stuck in the inner wall of the slot 208, the downward movement of the piston block 204 is blocked. Only when the double-helix metal sheet 203 is subjected to a sufficiently high temperature and has sufficient driving force can it push the piston block 204 to move downward.

[0042] Example 2: Please refer to Figure 8 , Fig. 9, a heat dissipation modular lithium battery pack, based on embodiment 1, the high temperature power-off device includes a stabilizing tube 114, the stabilizing tube 114 is fixedly installed on the inner end of the heat dissipation tube 101, and a conducting tube 501 is fixedly installed on the inner upper end of the heat dissipation tube 101, the conducting tube 501 is connected with the branch tube 5, and the upper and lower ends of the outer surface of the stabilizing tube 114 are fixedly installed with mounting rings 307, and the periphery of the mounting ring 307 is provided with a plurality of bimetallic strips 304 that can be deformed after being heated, and the bimetallic strips 304 are composed of two metal strips with different thermal expansion coefficients. When the heat released by the battery cell during operation is transferred to the outer surface of the heat dissipation tube 101 through the heat dissipation fins 7, the coolant flowing inside the heat dissipation tube 101 cannot take away the heat in time and quickly. At this time, the bimetallic strips 304 are deformed by heat, and the thermal expansion coefficient of the bimetallic strips 304 is lower than the thermal expansion coefficient of the double helical metal strips 203;

[0043] The bottom end of the bimetallic strip 304 is rotatably mounted with a rotating shaft 306, and the rotating shaft 306 is rotatably connected to the mounting ring 307 below the stabilizing tube 114 through a pin shaft, and the upper end of the stabilizing tube 114 is fixedly mounted with a stabilizing ring 301, and the outer surface of the stabilizing ring 301 is sleeved with a high-temperature resistant sealing rubber ring, and is tightly fitted with the inner wall of the heat dissipation tube 101, and the outer surface of the stabilizing ring 301 is provided with a plurality of holes of different sizes, which are distributed in a ring shape, and the large holes and the small holes are staggered with each other, wherein the large holes are slidably mounted with a conducting plug 302, and the small holes are used for the normal flow of coolant, and the bottom end of the conducting plug 302 is rotatably mounted with a traction rod 303, and the traction rod 303 is away from the conducting plug 3 One end of the conducting plug 302 is rotatably connected to the upper end of the bimetallic strip 304. Specifically, a limit block is fixedly installed on the outer surface of the conducting plug 302, and the limit block is located above the stabilizing ring 301, thereby preventing the conducting plug 302 from excessively moving downward, and a conducting cavity 305 is opened on the outer surface of the conducting plug 302, and the conducting cavity 305 is connected to the cavity above the stabilizing ring 301. If the temperature inside the heat dissipation pipe 101 rises, the bimetallic strip 304 also begins to deform, and the conducting plug 302 is pulled downward by the traction rod 303, so that the conducting cavity 305 connects the upper and lower cavities of the stabilizing ring 301, thereby increasing the volume of the coolant flow, so that it can take away more heat;

[0044] See also Fig.10 , Fig.11The inner bottom end of the stabilizing tube 114 is fixedly welded with a stabilizing tube 106, the inner end of the stabilizing tube 114 is penetrated with a connecting rod 103, the bottom end of the connecting rod 103 is fixedly connected with a contact block 104, and the upper end of the stabilizing tube 106 is fixedly installed with a contact piece 105 for clamping the contact block 104. Specifically, the contact piece 105 is made of copper, and the contact block 104 is also made of copper. The contact piece 105 is connected to the battery pack 3 through a wire, and the contact block 104 is connected to the discharge interface of the battery compartment 1 through a conductor. The inner end of the stabilizing cylinder 106 is fixedly installed with a telescopic tube 113, and the telescopic tube 113 is made of high temperature resistant rubber. The upper end of the telescopic tube 113 is fixedly connected with a push rod 109, and the push rod 109 and the stabilizing cylinder 106 are connected by a return spring 112, and the push rod 109 corresponds to the connecting rod 103. Specifically, the telescopic tube 113 divides the inner cavity of the stabilizing cylinder 106 into two upper and lower chambers, and the inner end of the stabilizing cylinder 106 is fixedly installed with an injection pipe 107, and the injection pipe 107 corresponds to the push rod 109;

[0045] like Figure 6 , Figure 8 , Fig.11 As shown, more specifically, the outer surfaces of the stabilizing tube 114 and the heat dissipating tube 101 are both provided with a plurality of conducting holes, the bottom end of the heating tube 201 is fixedly connected with a heat conducting tube 202, and the heat conducting tube 202 passes through the conducting holes on the outer surfaces of the heat dissipating tube 101 and the stabilizing tube 114 respectively and is fixedly connected with the stabilizing tube 106, the chamber below the piston block 204 in the heating tube 201 and the chamber below the telescopic tube 113 are both filled with coolant, when the piston block 204 moves downward, it squeezes the coolant to flow into the stabilizing tube 106 through the heat conducting tube 202, and is ejected through the ejector tube 107, and then pushes the ejector rod 109 to move upward;

[0046] A locking groove 110 is provided on the outer surface of the contact block 104, and a plurality of locking rods 111 are rotatably installed on the inner end of the stabilizing cylinder 106. The locking rods 111 are arranged in a ring shape, and are located above the telescopic tube 113. The upper end of the locking rod 111 is clamped in the locking groove 110, and the locking rod 111 is connected to the top rod 109 through a traction line 108. The traction line 108 is a metal wire wrapped with an insulating layer, and the traction line 108 is connected to the upper center of the locking rod 111 to prevent the top rod 109 from being unable to pull the locking rod 111 to rotate after moving downward;

[0047] like Figure 4 , Fig.10 , Fig.12As shown, the upper end of the connecting rod 103 is fixed with a drag block 102 for easy grasping by bolts, the drag block 102 is located above the heat dissipation pipe 101, and the drag block 102 is made of insulating material, the conducting pipe 501 and the stabilizing pipe 114 are connected by a rubber sleeve 502, and the rubber sleeve 502 is made of high-temperature resistant rubber material, a reflux groove 506 is provided at one end of the conducting pipe 501 close to the stabilizing pipe 114, and the upper end of the rubber sleeve 502 is located on the inner side of the reflux groove 506, and a sealing ring 505 is fixedly installed on the outer surface of the connecting rod 103, the sealing ring 505 is located inside the rubber sleeve 502, and the sealing ring 505 corresponds to the reflux groove 506, after the connecting rod 103 moves upward, it drives the sealing ring 505 to penetrate the inside of the reflux groove 506, and under the action of the rubber sleeve 502, the reflux groove 506 is blocked;

[0048] A negative pressure cylinder 503 is fixedly installed at the inner end of the conducting tube 501, and a plug rod 504 is slidably installed at the output end of the negative pressure cylinder 503. The end of the plug rod 504 away from the negative pressure cylinder 503 is fixedly connected to the sealing ring 505 by bolts. After the plug rod 504 moves downward, negative pressure is generated in the negative pressure cylinder 503.

[0049] The working principle of the present invention is:

[0050] During the discharge process of the battery pack 3, the generated heat is transferred to the outer surface of the heat pipe 101 through the heat dissipation fins 7, and then the heat dissipation device 2 starts to work, and the coolant in the heat pipe 101 is continuously extracted through the return pipe 4 and the branch pipe 5. When the battery cells in the battery pack 3 are discharged for a long time, a large amount of heat will be generated, so that the temperature inside the heat pipe 101 becomes high. At this time, the bimetallic strip 304 is deformed by heat. During the deformation process, the conducting plug 302 is pulled downward by the traction rod 303, so that the conducting cavity 305 connects the upper and lower cavities of the stabilizing ring 301, thereby increasing the volume of the coolant flow, so that it can take away more heat;

[0051] Then, when the heat of the battery core continues to rise, if it is continued to be used, there may be a risk of explosion. At this time, the double-helix metal sheet 203 inside the heating cylinder 201 begins to deform due to the heat, and then pushes the piston block 204 to move downward, and the coolant inside the heating cylinder 201 is squeezed into the stabilizing cylinder 106, and then it is ejected through the injection pipe 107 and pushes the ejector rod 109 to move upward. Then the upper end of the ejector rod 109 pushes the contact block 104 upward. At this time, the locking rod 111 begins to loosen. At the same time, the negative pressure cylinder 50 3 is in a negative pressure state, so that the plug rod 504 moves upward, and the plug rod 504 drives the sealing ring 505 and the connecting rod 103 to move upward. At this time, the contact block 104 is disconnected from the contact sheet 105, and after the connecting rod 103 moves upward, it drives the sealing ring 505 to penetrate the inside of the reflux groove 506, and under the action of the rubber sleeve 502, the reflux groove 506 is blocked, so that the coolant stops flowing, and the battery cell is cooled naturally, so as to avoid the sudden contraction of the outer surface of the battery cell when it is cold, which causes irreversible damage in the battery cell;

[0052] If power needs to be restored, press the drag block 102 to move the connecting rod 103 downward, and the contact block 104 will be re-stuck in the contact piece 105 and push the top rod 109 downward. Then, the locking rod 111 will be pulled by the traction line 108 to rotate in the direction of approaching each other and be engaged in the locking groove 110 on the outer surface of the contact block 104, and the plug rod 504 will be pulled, so that the negative pressure cylinder 503 will return to a negative pressure state.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed in the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat dissipation modular lithium battery pack, comprising a battery compartment (1), characterized in that: A plurality of battery packs (3) are fixedly mounted on the inner end of the battery compartment (1), and the battery packs (3) are arranged in a rectangular array. A heat dissipation device (2) is fixedly mounted on the right end of the battery compartment (1), and heat dissipation pipes (101) for continuously cooling the battery cells are fixedly mounted in the battery packs (3). A water return pipe (4) is arranged on the inner end of the battery compartment (1), and the output end of the water return pipe (4) is fixedly connected to the input end of the heat dissipation device (2). A branch pipe (5) is fixedly connected to the upper end of the heat dissipation pipe (101), and the branch pipes (5) are fixedly connected to the water return pipe (4). The heat dissipation pipe (101) and the water return pipe (4) are fixedly connected to each other. ) are both filled with cooling liquid for transferring heat, a plurality of cooling fins (7) are fixedly mounted on the outer surface of the heat dissipation tube (101), and the cooling fins (7) are tightly fitted to the outer surface of the battery core around the heat dissipation tube (101), a high-temperature power-off device is arranged inside the heat dissipation tube (101), a water inlet pipe (6) is fixedly mounted on the inner bottom end of the battery compartment (1), the output end of the water inlet pipe (6) is fixedly connected to the output end of the heat dissipation device (2), a plurality of shunt pipes (61) are fixedly connected to the outer surface of the water inlet pipe (6), and the shunt pipes (61) are fixedly connected to the bottom end of the heat dissipation tube (101).

2. A heat dissipation modular lithium battery pack according to claim 1, characterized in that: A plurality of stabilizing holes are provided at the inner end of the heat dissipation fin (7), and a heating tube (201) is fixedly installed in each of the stabilizing holes. The heating tube (201) is arranged in a ring shape, and a guide rod (205) is fixedly installed at the inner end of the heating tube (201). A piston block (204) is slidably installed on the outer surface of the guide rod (205), and a liquid that can expand when heated is filled between the upper side of the piston block (204) and the heating tube (201).

3. The heat dissipation modular lithium battery pack according to claim 1, characterized in that: The high-temperature power-off device comprises a stabilizing tube (114), the stabilizing tube (114) being fixedly mounted on the inner end of a heat dissipation tube (101), and a conducting tube (501) being fixedly mounted on the inner upper end of the heat dissipation tube (101), the conducting tube (501) being connected to a branch tube (5), and mounting rings (307) being fixedly mounted on both upper and lower ends of the outer surface of the stabilizing tube (114), and a plurality of bimetallic strips (304) that can deform when heated are arranged on the periphery of the mounting ring (307).

4. A heat dissipation modular lithium battery pack according to claim 3, characterized in that: A rotating shaft (306) is rotatably mounted on the bottom end of the bimetallic strip (304), and the rotating shaft (306) is rotatably connected to a mounting ring (307) below the stabilizing tube (114), and a stabilizing ring (301) is fixedly mounted on the upper end of the stabilizing tube (114).

5. The heat dissipation modular lithium battery pack according to claim 4, characterized in that: The outer surface of the stabilizing ring (301) is provided with a plurality of holes of different sizes, wherein a conducting plug (302) is slidably installed in each of the large holes, and the small holes are used for the normal flow of cooling liquid. A traction rod (303) is rotatably installed at the bottom end of the conducting plug (302), and the end of the traction rod (303) away from the conducting plug (302) is rotatably connected to the upper end of the bimetallic strip (304).

6. The heat dissipation modular lithium battery pack according to claim 5, characterized in that: A stabilizing tube (106) is fixedly mounted on the inner bottom end of the stabilizing tube (114), a connecting rod (103) is passed through the inner end of the stabilizing tube (114), a contact block (104) is fixedly connected to the bottom end of the connecting rod (103), and a contact sheet (105) for clamping the contact block (104) is fixedly mounted on the upper end of the stabilizing tube (106).

7. A heat dissipation modular lithium battery pack according to claim 6, characterized in that: A telescopic tube (113) is fixedly mounted on the inner end of the stabilizing tube (106); a push rod (109) is fixedly connected to the upper end of the telescopic tube (113); the push rod (109) and the stabilizing tube (106) are connected via a return spring (112); the push rod (109) corresponds to the connecting rod (103); an injection tube (107) is fixedly mounted on the inner end of the stabilizing tube (106); the injection tube (107) corresponds to the push rod (109).

8. The heat dissipation modular lithium battery pack according to claim 7, characterized in that: The outer surface of the contact block (104) is provided with a locking groove (110), and a plurality of locking rods (111) are rotatably mounted on the inner end of the stabilizing cylinder (106). The locking rods (111) are arranged in a ring shape, and the upper ends of the locking rods (111) are clamped in the locking groove (110), and the locking rods (111) and the top rod (109) are connected via a traction line (108).

9. The heat dissipation modular lithium battery pack according to claim 3, characterized in that: The conducting tube (501) is connected to the stabilizing tube (114) via a rubber sleeve (502); a reflux groove (506) is provided at one end of the conducting tube (501) close to the stabilizing tube (114); and the upper end of the rubber sleeve (502) is located inside the reflux groove (506).

10. The heat dissipation modular lithium battery pack according to claim 6, characterized in that: A sealing ring (505) is fixedly mounted on the outer surface of the connecting rod (103). The sealing ring (505) is located inside the rubber sleeve (502), and the sealing ring (505) corresponds to the reflux groove (506). When the connecting rod (103) moves upward, it drives the sealing ring (505) to pass through the reflux groove (506).

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